元坝气田含硫污水负压汽提脱硫工艺影响因素分析与优化

doi:10.13809/j.cnki.cn32-1825/te.2020.04.020

摘要/Abstract

摘要：

针对目前元坝气田汽提塔脱硫效率低、正压汽提技术表现出局限性、存在极大优化空间的现象,开展了负压汽提脱硫新工艺现场试验,并对汽提效率影响因素进行深入分析研究。通过参数优化,得到最优进液pH值控制在4.0 ~ 5.0,推荐汽提塔塔压控制在-30 ~ -25 kPa,最优气液比为8 ~ 12,汽提进液量为7 ~ 9 m ³/h,有利于提高汽提效率。现场应用表明,优化后负压汽提效率达到96.28 %,比正压汽提提高19.68 %,年节约成本约180.86万元,降本增效效果显著。负压汽提脱硫新工艺表现出明显的技术优势和良好的应用前景,也为同类海相高含硫气田的现场应用提供一定的参考。

关键词: 高含硫气田水, 负压汽提, 汽提效率, 影响因素分析, 参数优化, 降本增效

Abstract:

In view of the low desulfurization efficiency of stripper, limitation of positive pressure stripping technology and great optimization space in Yuanba gas field, a new process of negative pressure stripper desulfurization is carried out, and the influencing factors of stripper efficiency are analyzed in depth. By parameter optimization, the optimal pH value is 4.0~5.0, the recommended stripper pressure is -30~-25 kPa, the optimal gas-liquid ratio is 8~12, and the liquid inlet volume is 7~9 m ³/h, which is conducive to improving the stripper efficiency. The field application shows that the efficiency of negative pressure stripping is 96.28 %, 19.68 % higher than that of positive pressure stripping. The annual cost saving is about 1 808 600 yuan, which has significant effect on cost reduction and benefits enhancement. The new process of negative pressure stripping desulfurization shows obvious technical advantages and good application prospects, and also provides certain reference for the field application of similar marine high sulfur gas fields.

Key words: high sulfur-containing gas field water, negative pressure stripping, stripping efficiency, influence factor analysis, parameter optimization, cost reduction and benefit enhancement

中图分类号:

TE45

刘鹏刚,孙天礼,陈伟等. 元坝气田含硫污水负压汽提脱硫工艺影响因素分析与优化[J]. 油气藏评价与开发, 2020, 10(4): 125-129.

Penggang LIU,Tianli SUN,Wei CHEN, et al. Analysis and optimization of influencing factors of negative pressure stripping desulfurization process for sour water in Yuanba gas field[J]. Reservoir Evaluation and Development, 2020, 10(4): 125-129.

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处理阶段	计算过程
一级汽提	Q₁ = 盐酸日用量×盐酸单价×天数= 0.7×700×365=178 850元
二级氧化	Q₂ = 0.007 658×汽提水量×进水硫化物×优化前后汽提效率差×H₂O₂单价×天数 = 0.007 658×480×1 610×（96.28 %-76.6 %）×3.5×365≈1 487 881元
三级絮凝沉降	Q₃ = 0.001×汽提水量×进水硫化物×优化前后汽提效率差×污泥处理单价×天数/污泥含水率 = 0.001×480×1 610×（96.28 %-76.6 %）×4.5×365/50 %≈499 605元
经济效益	Q_总 = Q₂+Q₃-Q₁ ≈148.78+49.96-17.88=180.86万元